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Re: Precedence in tts:fontFamily

From: Pierre-Anthony Lemieux <pal@sandflow.com>
Date: Thu, 7 Jul 2016 10:21:52 -0700
Message-ID: <CAF_7JxDd+T-9YmkVxFD47wQUJKfu2MJA-JyPx2U9QpuJ4vwGqw@mail.gmail.com>
To: Glenn Adams <glenn@skynav.com>
Cc: "public-tt@w3.org" <public-tt@w3.org>
Thanks.

-- Pierre

On Thu, Jul 7, 2016 at 10:18 AM, Glenn Adams <glenn@skynav.com> wrote:
> TTML1 defers to XSL-FO which defers to CSS2 the semantics of font mapping.
> This is done implicitly in [1] via:
>
> The semantics of the style property represented by this attribute are based
> upon that defined by [XSL 1.1], ยง 7.9.2.
>
> [1] https://www.w3.org/TR/ttaf1-dfxp/#style-attribute-fontFamily
>
> TTML2 has a placeholder to document this process more explicitly [2]. See
> the second editorial note: Font Selection.
>
> [2]
> http://w3c.github.io/ttml2/spec/ttml2.html#style-attribute-fontSelectionStrategy
>
>
>
> On Thu, Jul 7, 2016 at 11:11 AM, Pierre-Anthony Lemieux <pal@sandflow.com>
> wrote:
>>
>> Hi Glenn,
>>
>> > order definitely matters
>>
>> Ok. Makes sense to me. I could not find a clear statement to that
>> effect in TTML1. Do you see one? If not, perhaps add one in the next
>> errata and updated TTML2 accordingly?
>>
>> Best,
>>
>> -- Pierre
>>
>> On Thu, Jul 7, 2016 at 10:08 AM, Glenn Adams <glenn@skynav.com> wrote:
>> >
>> >
>> > On Thu, Jul 7, 2016 at 10:53 AM, Pierre-Anthony Lemieux
>> > <pal@sandflow.com>
>> > wrote:
>> >>
>> >> Hi all,
>> >>
>> >> (Hopefully) quick questions: (i) is the ordering of values in
>> >> tts:fontFamily significant and (ii) does familyName take precedence
>> >> over genericFamilyName?
>> >
>> >
>> > order definitely matters
>> >
>> >>
>> >>
>> >> For instance, are the following two declarations equivalent?
>> >>
>> >> tts:fontFamily="proportionalSansSerif,Arial"
>> >> tts:fontFamily="Arial,proportionalSansSerif"
>> >
>> >
>> > it depends; if proportionalSansSerif maps to Arial (on some
>> > implementation)
>> > then they would be equivalent (on that implementation)
>> >
>> >>
>> >>
>> >> ... and what is the expected outcome of the following?
>> >>
>> >> tts:fontFamily="proportionalSansSerif,proportionalSerif"
>> >
>> >
>> > if proportionalSansSerif maps to F1 and proportionalSerif maps to F2,
>> > and if
>> > the character maps (cmap tables) of both F1 and F2 define mappings for
>> > the
>> > same set of characters, then the above would be equivalent to:
>> >
>> > tts:fontFamily="proportionalSansSerif" or
>> > tts:fontFamily="F1"
>> >
>> >>
>> >>
>> >> Thanks,
>> >>
>> >> -- Pierre
>> >>
>> >
>
>
Received on Thursday, 7 July 2016 17:22:40 UTC

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